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package oo15loipe;
/**
* Loipe class
*
* @author Camil Staps, s4498062 // Thijs Heijligenberg, s4451414
*/
public class Loipe implements InfoLoipe {
/**
* Class constants for direction (for readability)
*/
private final static int
DIRECTION_EAST = 0,
DIRECTION_SOUTH = 1,
DIRECTION_WEST = 2,
DIRECTION_NORTH = 3;
/**
* The height and width of the loipe
*/
private int height = 0, width = 0;
/**
* Start point
* The path in coordinates
* The current position
* The map as 2D array of Fragments
*/
private Punt start;
private Punt[] path;
private int path_pointer = 0;
private Fragment[][] loipe;
/**
* Construct the loipe based on a path
*
* @param pad
*/
public Loipe (String pad) {
setLoipe(pad);
}
/**
* Refresh everything based on a new path
*
* @param pad
*/
public final void setLoipe(String pad) {
setWidthAndHeight(pad);
fillLoipe(pad);
path_pointer = 0;
}
/**
* Set the width and height of the loipe based on a path
*
* @param pad
*/
private void setWidthAndHeight(String pad) {
int direction = DIRECTION_NORTH;
int maxX = 0, maxY = 0, minX = 0, minY = 0;
Punt current_point = new Punt(0,0);
for (int i = 0; i < pad.length(); i++) {
if (current_point.getX() < minX)
minX = current_point.getX();
if (current_point.getX() > maxX)
maxX = current_point.getX();
if (current_point.getY() < minY)
minY = current_point.getY();
if (current_point.getY() > maxY)
maxY = current_point.getY();
switch (pad.charAt(i)) {
case 'r':
switch (direction) {
case DIRECTION_EAST: direction = DIRECTION_SOUTH; break;
case DIRECTION_SOUTH: direction = DIRECTION_WEST; break;
case DIRECTION_WEST: direction = DIRECTION_NORTH; break;
case DIRECTION_NORTH: direction = DIRECTION_EAST; break;
}
break;
case 'l':
switch (direction) {
case DIRECTION_EAST: direction = DIRECTION_NORTH; break;
case DIRECTION_SOUTH: direction = DIRECTION_EAST; break;
case DIRECTION_WEST: direction = DIRECTION_SOUTH; break;
case DIRECTION_NORTH: direction = DIRECTION_WEST; break;
}
}
switch (direction) {
case DIRECTION_EAST: current_point = new Punt(current_point.getX() + 1, current_point.getY()); break;
case DIRECTION_SOUTH: current_point = new Punt(current_point.getX(), current_point.getY() + 1); break;
case DIRECTION_WEST: current_point = new Punt(current_point.getX() - 1, current_point.getY()); break;
case DIRECTION_NORTH: current_point = new Punt(current_point.getX(), current_point.getY() - 1); break;
}
}
height = maxY - minY + 1;
width = maxX - minX + 1;
start = new Punt(-minX, -minY);
}
/**
* Fill the loipe with fragments based on a path.
* Assumes the width, height and start attributes to be correct.
*
* @param pad
*/
private void fillLoipe(String pad) {
loipe = new Fragment[width + 1][height + 1];
path = new Punt[pad.length()];
Punt current_point = start;
int direction = DIRECTION_NORTH;
for (int i = 0; i < pad.length(); i++) {
path[i] = current_point;
if (loipe[current_point.getX()][current_point.getY()] != null) {
loipe[current_point.getX()][current_point.getY()] = Fragment.KR;
} else {
switch (pad.charAt(i)) {
case 'r':
switch (direction) {
case DIRECTION_EAST: loipe[current_point.getX()][current_point.getY()] = Fragment.ZW; break;
case DIRECTION_SOUTH: loipe[current_point.getX()][current_point.getY()] = Fragment.NW; break;
case DIRECTION_WEST: loipe[current_point.getX()][current_point.getY()] = Fragment.NO; break;
case DIRECTION_NORTH: loipe[current_point.getX()][current_point.getY()] = Fragment.ZO; break;
}
break;
case 'l':
switch (direction) {
case DIRECTION_EAST: loipe[current_point.getX()][current_point.getY()] = Fragment.NW; break;
case DIRECTION_SOUTH: loipe[current_point.getX()][current_point.getY()] = Fragment.NO; break;
case DIRECTION_WEST: loipe[current_point.getX()][current_point.getY()] = Fragment.ZO; break;
case DIRECTION_NORTH: loipe[current_point.getX()][current_point.getY()] = Fragment.ZW; break;
}
break;
case 's':
switch (direction) {
case DIRECTION_EAST:
case DIRECTION_WEST:
loipe[current_point.getX()][current_point.getY()] = Fragment.OW;
break;
case DIRECTION_SOUTH:
case DIRECTION_NORTH:
loipe[current_point.getX()][current_point.getY()] = Fragment.NZ;
}
}
}
switch (pad.charAt(i)) {
case 'r':
switch (direction) {
case DIRECTION_EAST: direction = DIRECTION_SOUTH; break;
case DIRECTION_SOUTH: direction = DIRECTION_WEST; break;
case DIRECTION_WEST: direction = DIRECTION_NORTH; break;
case DIRECTION_NORTH: direction = DIRECTION_EAST; break;
}
break;
case 'l':
switch (direction) {
case DIRECTION_EAST: direction = DIRECTION_NORTH; break;
case DIRECTION_SOUTH: direction = DIRECTION_EAST; break;
case DIRECTION_WEST: direction = DIRECTION_SOUTH; break;
case DIRECTION_NORTH: direction = DIRECTION_WEST; break;
}
}
switch (direction) {
case DIRECTION_EAST: current_point = new Punt(current_point.getX() + 1, current_point.getY()); break;
case DIRECTION_SOUTH: current_point = new Punt(current_point.getX(), current_point.getY() + 1); break;
case DIRECTION_WEST: current_point = new Punt(current_point.getX() - 1, current_point.getY()); break;
case DIRECTION_NORTH: current_point = new Punt(current_point.getX(), current_point.getY() - 1); break;
}
}
}
@Override
public int getHeight() {
return height;
}
@Override
public int getWidth() {
return width;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
for (Punt p : path) {
sb.append(p).append(" -> ");
}
return sb.toString();
}
@Override
public Fragment getFragment(int x, int y) {
return loipe[x][y];
}
@Override
public Punt start() {
return start;
}
/**
* We chose to have the man go back to the start when he has finished the loipe.
*/
@Override
public Punt stap() {
if (path_pointer >= path.length) {
path_pointer = 0;
}
Punt result = path[path_pointer];
path_pointer++;
return result;
}
}
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